disable alt+tab

I need to know is it possible to disable the alt+tab whilerunning an application?for those people who had helped me with myprevious problem,thanks.i had disable buttons on the jframe.i usedsetUndecorated(true); in fact it works like jwindow.now myapplication with a mouse click or keypress,the black frame will bedispose.but i need to disable the alt+tab so that user cannot switchprogram using this.the only way they can end the application is bydisposing the frame.anyone have any idea on this